The duo originally sprang to fame as part of the cast of the scripted reality show, The Hills.

Heidi was introduced to the show by the star, her BFF Lauren Conrad.

Things turned sour when Heidi began hooking up with Spencer and the friendship completely imploded when rumours began to circulate of a sex tape Conrad had made with her then boyfriend on the show, Jason Wahler.

It was Spencer who leaked the rumours but Heidi stood by her man and her relationship with Lauren never recovered.

The controversial couple have made a name for themselves as serial reality stars in the years since The Hills, and can always be relied upon to stir the pot.

We know all about Spencer’s scheming and Heidi’s surgery – but here are seven lesser known facts about Speidi you may now know;

Heidi Montag and Spencer Pratt celebrate the 2016 festive period with their annual Christmas card shoot

Crystal clear

Spencer first became obsessed with crystals while he was on The Hills.

He turned to the healing gems to try to cope with the stress of the show – and has literally spent his fortune on them.

The first crystal he bought cost $75,000 which wasn’t a problem at the height of Speidi’s earnings – he saw it, liked it and bought it.

Spencer told Complex that an hour later his business manager called him wondering what he’d just purchased for such a large sum. He said; “I was like, ‘It’s a rock, bro’. ”

The obsession grew and his collection swelled to hundreds of pieces which he estimates has cost him up to $1million.

It is unknown whether the gems have brought Spencer inner peace and he says of some of the healing stones; “This is supposed to be bringing in money, but I can tell you it doesn’t work. Citrine is supposed to bring wealth. I’m just waiting.”

Spencer Pratt needs his crystals to help him cope with stress of The Hills

Kardashian konnection

Spencer claims that he was approached by Kris Jenner to manage Kim Kardashian.

Pratt started his reality career when, after seeing the success of MTV's The Osbornes, he pitched the idea of Princes Of Malibu to Fox.

The network liked it and the show following Spencer's childhood friend Brody Jenner's family was commissioned - with Fox wanting Spencer on camera rather than behind it.

After Princes was cancelled and Brody started appearing on The Hills, it seemed only natural that his step-sister Kim Kardashian, who was a stylist at the time, should come over and organize Heidi's closet.

The scenes featuring Kim were ultimately cut from the show, but Spencer says Kris Jenner saw the potential for her daughter and soon after asked him to manage Kim (which Kim's rep denies).

He told Complex; "She can deny it if she wants, but she comes up to me and is like, 'Spencer, I want you to manage Kim.' I literally started laughing. What is this lady talking about?"

Living off dad...

The couple blew through all their money after The Hills was cancelled.

They spent six months living in the Ritz Carlton in Costa Rica along with their four dogs - ordering room service for themselves and their pets for every meal.

Along with Spencer's crystal obsession and Heidi's numerous surgeries (10 procedures in one day), they thought nothing of ordering $3,000 bottles of wine and $15,000 Hermes handbags before the money ran out.

They now live rent free in Spencer's dad's beach front holiday home in Santa Barbara, California.